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I have a 98 chevy malibu v6 a common car that i just put new brake pads on and new drum brakes on ba...

I have a 98 chevy malibu v6 a common car that i just put new brake pads on and new drum brakes on back as well but my brake pedal is going all the way to the floor what do i do does anyone know the problem im having?

there is absolutely nothing else wrong with the car it runs and drives fine but i put all new brakes on front and drum brakes for back but there is still no pressure on the brake pedal what are my options or is there something that i would have to replace.

If you just changed the pads and shoes, bleeding is not
required. But adjusting the rear shoes is. Assuming that
the rear shoes are installed correctly spin the rear wheel in
the direction of the car going in reverse. Advance the star
wheel until a heavy drag is felt. Now back off the star
wheel until the wheel just spins freely. Repeat at the other
rear wheel. Check the brake fluid level in the master
cylinder when you're done, as well. HTH. -Jim

I have purchased (for both rear brakes) pads, drums, slave cylinders, hoses, bleed air out, and sanded the pad on the side where it looks like only part of the pad is hitting the drum. It still fails ...